Stove-door



H. HERRENBRUCK AND F. ANDREAS.

STOVE DOOR.

APPLICATION FILED FEB. l5. |919.

13,011,891' v Patented Aug. 5, 1919.,

Tm: COLUMBIA PLANOGRAPH co.. WASMINTON. D.

UNITED STATES PATENT OFFICE.

HERMAN HERRENBRUCK AND FREDERICK ANDREAS, OF ST. LOUIS, MISSOURI,

ASSIG-NORS T0 BRIDGE & BEACH MFG. CO., OF ST. LOUIS, MISSOURI, A COR-PORATION 0F MISSOURI.

STOVE-DOOR.

To all whom it may concern:

Be it known that We, HERMAN HERREN-` nncii and FREDERICK ANDREAS,citizens of the United States, residing in the city of St. Louis, Stateof Missouri, have invented a certain new` and useful Improvement inStove-Doors, of which the following is a full, clear, and exactdescription, such as will enableothers skilled in the art to which itappertains to make and use the same.

This invention relates to pivetally mounted stove doors of the ytypethat are equipped with a spring for counterbalancing the door. @ne kindof stove door that is now in general use is provided with a 4trunnionthat carries a forwardly projecting arm to which the lower end of acontractile lspring is connected, said spring being arranged in ahousing on the. front side of the door frame and the upper end of saidspring being connected to the upper end of the spring housing in such amanner that the spring is under tension at all times, both when the,door is closed and open. The spring is apt to lose its resiliency orbreak quickly, due to the fact that it is alwaysv under tension, anditis apt to squeak or make a noise when it stretches, duringtheoperation of opening the door. Accordingly, stove doors provided withcontractile springs of the character referred to are a source ofconsiderable annoyance to stove owners, dealers .rncl'inanufactlirers,as the springs have to ,be replaced frequently. Another objection ablecharacteristic of stove doors of the kind above referred to is vthat thespring housingv on the door frame projects forwardly from the frame aconsiderable disstance and detracts materially from the appearance ofthe stove.

The main object of our invention is to provide a spring operated stovedoor which is so constructed that the operating spring will not wear outquickly, break or make a noise when the door is being opened or closed.

Another object is to provide azzspring operated stove door which is soconstructed that the spring housing can be arranged in such a positionthat it does not dletract from the appearance of the stove.

And still another object is to provide a stove door structure in whichthe removable portion of the spring housing is retained in position in anovel manner.

Speciication of Letters Patent.

v Patented Aug. 5, 1919.

Application led February 15, 1919. Serial No. 277,215.

Figure 1 of the drawings is a front eleva tional View of a portion of astove equipped with a spring operated stove door constructed inaccordance With our invention; and

Fig. 2 is a vertical sectional View, taken on the line 2-2 of Fig. 1.

Referring to the drawings which illustrate the preferred form of ourinvention, A designates a pivotally mounted stove door, B the stationaryframe that surrounds the opening which the door closes and C one of thetrunnions on the lower edge of the door that forms part of the means forpivotally connecting the door to the door frame B.

The door A is counterbalanced by a cornpression spring D which exertsdownward pressure on a rod 1 provided on its lower end with a fork orbifurcated portion 2 that engages a laterally-projecting pin 3 on an arm4 which projects rearwardly from the trunnion C, the rod 1 projectingupwardly into the spring D, as shown in Fig. Q. Said spring D isarranged vertically in a spring housing E whose upper end serves as astop or abutment for the upper end of said spring and the parts are soproportioned and ararranged that the springD is under little or notension when the door is in its closed position, and will counterbalancethe door during the operation of opening the door.

By referring to Fig. 2 it will be noted that the spring D is positionedat the rear side of the axis about which the door turns in a springhousing that projects rearwardly from the rear side of the door frame B.Consequently, the spring housing does not detract from the appearance ofthe stove, as the front side of said housing is flush or substantiallyflush with the front side of the door frame. In order that the spring Dmay be arranged easily in the spring housing E, during the operation ofassembling the stove, the front Wall of said housing is formed by adetachable section E that is retained in position bv a single bolt orother suitable fastening device. In the form of our invention hereinshown the detachable section E of the spring housing is provided at itsupper end with a lug or hook 5 which projects rearwardly and upwardlythrough a hole in the top portion of the spring housing, as shown inFig. 2, said lug being so shaped that it prevents the upper en'd portionoi the detachable section E from moving outwardly. The lower end portionof the detachable section E is retained in positio-n by means ofa boltorother suitable fastening device 6 that passes through said section andthrough the lower edge portion of the door frame B.

Then the door isv closed, as sho-wn in Fig. 2, the spring D is underlittle or no tension, said spring being` arranged substantially parallelto the door Al between the upper end of the spring housing1 E and thebifurcated portion 2 at the lower end of the guide rod l. Then the doorA is moved outwardly into its open position the pin 3 on the 'rearwardlyprojecting arm i moves upwardly and thus places the spring D undertension, said spring being'sovdesigned that it will counter balance thedoor when it is moving to and from its open position. When the door A isfully open it is supported by a lug 7 on the detachable section E of thespring housing that lits in a notch 8 in the door A.

'Having thus described our invention, what we claim and desire to secureby Letters Patent, is:

l. A stove door provided `adjacent its pivotal edge with arearwardly-projecting arm, and a compression spring combined with saidarmin such a manner that it will counterbalance the door and will`becompressed when the door is moved into itsV open position. Y

2. A stove provided with a pivotally mounted door, an arm projectingrearwardly from vsaid Ydoor adjacent the axis IiaboutV which the doorturns, and a compression spring arranged at the rear of said axis atsubstantially a right angle to said arm and y Copies of this patentmaybe obtained for spring to be compressed 'when the door is moved into itsopen position.

4. A stove provided with .a pivotally mounted door, an arm projectingrearwardly from the hinged lower .edge portion koij' the door, alaterally-projecting pin on said arm, a compression spring arranged ina-lioui-iiii,c on the door frame located at the rear of the axis aboutwhich the door turns,

and a rod projecting' upwardly into said turns, and avertically-disposed compression spring arranged in said housing ibetweenthe upper end` of same and said pin for counterbalancing the door whenit is moving to and from its open position. j 6. A stove provided with apivotally mounted door, v a compression spring for counterbalancingsaid` door, Va door frame provided with a housing forv said springlocated at thel rear of the axis about which the door turns, and adetachable section orsaid housing arranged flush or substantially flushwith the front side of the door frame. 7. A stove provided withV apivotally mounted) door, a compression spring for counterbalancing saiddoor, a door frame provided with a housing for said spring located atthe rear of the axis about which the door turns, a detachable sectionfor vsaid housing arranged iush or substantially Aflush with the frontside of the door frame and provided at its upper endvwith a lug orhookVthat coperates with the door frame yto prevent the upper end of saidsection fromV swinging outwardly, and a bolt or other suit ablefastening device for securing'the lower end of said' section to the doorframe.

HERMAN HERRENBRCK FREDERICK iiitiiirins.V

fivev cents each. byaddres'sing the Commissioner of iIatents,Washiingtoii,l D. G. Y'

